remove custom sonatype deployment profile

we'll inherit the right one from the parent pom.
Merge pull request #831 from sameb/rm-custom-sonatype-deployment

remove custom sonatype deployment profile
Move utility scripts to util dir, add secure vars to CI username/pwd, update POM to use canonical snapshot dir, add support for snapshot on succesful commit in Travis.
Merge pull request #832 from sameb/publish-snapshots

Publish snapshots on successful commits